From: Florian Gross <flgr@...>
Date: 2005-03-26T04:14:50+09:00
Subject: Hash::MixIn and Python style Object#dict

Moin.

I just did a quick implementation of Hash::MixIn (you provide .keys, 
..fetch, .store and .delete and get a full-blown Hash interface) and 
Python style Hash access to an Object's methods.

Here's a quick sample IRB session:

irb(main):001:0> obj = "foo"
=> "foo"
irb(main):002:0> obj.dict[:reverse] = "Let's lie.".dict[:reverse]
=> #<Method: String#reverse>
irb(main):003:0> obj.reverse
=> ".eil s'teL"
irb(main):004:0> obj.dict.values_at(:reverse, :+)
=> [#<Method: "foo".reverse>, #<Method: String#+>]
irb(main):005:0> obj.dict.reject! { |key, value| key.to_s[0] == ?r }
=> #<MethodDict: :send=>#<Method: String(Kernel)#send>, ...>
irb(main):006:0> obj.dict.include?(:rindex)
=> false

The implementation of all this is available at 
http://flgr.0x42.net/method-dict.rb

I might include Hash::MixIn as a sample in the ruby-contract library as 
it would be a good case for automatically adding to the interface when a 
given Contract is met.

Anyway, does any part of this look useful to you?

I've heard quite a few requests for a Hash mix-in, but I'm not sure how 
to best make this available to the general public.

Regards,
Florian Gross